Francis w



(No Model.)

EKW. MALLETT. BELT SHIPPER AND LOCK.

Patented May '7, 18 89.

Zz/anQor:

,. UNITED STATES PATENT OFFICE. 1

FRANCIS w. MALLETT, on NEW YORK, N. Y.-, nssrenoa TO DENNIS rnrsnrn,

or .YSAME PLACE.

SPECIFICATION forming part of Letters Patent No. 402,603, dated May '7,1889.

Application filed January 9, 1889. Serial No. 295,848. (No model.)

To all whom it may concern.-

Be it known that I, FRANCIS W. MALLETT, of the city and county of NewYork, .in the Stateof New York, have invented a certain new and ImprovedBelt-Shipper and Look, of which the following is a specification.

My shipper works in the long-approved manner by fingers acting on thebelt, the fingers being carried on a horizontal bar supported in fixedbearings and capable of being moved endwise to the proper extent to shipthe belt from a fast pulley to a loose pulley alongside and back again,as required. There have been many attempts to produce the requiredmovement of the shipper by pulling on a cord leading to a pointinconvenient to the reach of the attendant, and to lock the shipper ineither position into which it may be shifted, thus insuring that itshall remain as long as desired without being displaced by any tremulousmotion of the machinery or other accidental cause until the cord-isagain pulled. I have devised improved means of attaining this end.

The accompanying drawings form a part of this specification andrepresent what I consider the best means of carrying out the invention.

Figure 1 is a front elevation. Fig. 2 is a similar view showing thecondition after the belt has been shifted. Fig. 3 is a side view. Fig. 4is a vertical central section showing a portion. Fig. 5 is a view of therear face of one of the parts detached. Fig. 6 is a front elevation ofthe, main portion of the bracket with all the parts removed.

Similar letters of reference indicate corresponding parts in all thefigures where they occur.

A is a bracket of cast-iron or other suitable material, firmly boltedupon a cross-timber in the floor above, or upon other convenientsupport.

B is a wheel having a grooved periphery, and turning freely on a pin, A,fixed in the casting A. A cord, 0, extends nearly or quite around in thegroove in the periphery of B, and downward to a point convenientlyaccessible to theattendant. When the attendant pulls on the cord, heturns the wheel B in the .direction indicated by the arrow.

turn the wheel in the direction opposite to that indicated by the arrow.

B is a crank-pin set in the frontfaoe of the wheel B, and receiving oneend of a connecting-rod, E. The upper end of this rod carries astiffly-mounted horizontal pin, E, which extends through apeculiarly-shaped aperture, a, in the bracket A, and protrudes on theother side. This pin is at each partial revolution of the wheel B moveddownward and upward, and performs important functions.

The general form of the aperture a is that of an elongated horseshoe.The two lower branches will, when necessary, be distinguished bysupernumerals a and a There is a notch, a in the extreme upper end oithe aperture, in which the upper half of the pin E is received at eachascent. So far as yet appears, the pin E, on being drawn downward, isfree to traverse in either branch a or a of the aperture.

On a pin, A fixed in the bracket A, is mounted a swinging or partialturning piece, G, certain portions of which will be designated, whennecessary, by supernumerals, as G G In its lower end is a slot, g, whichreceivesa pin, M, set in the shipper-rod M. It will be understood thatanother point in this shipper-rod carries the fingers which act on thebelt, and which fingers may be of any ordinary or suitable constructionand perform their usual functions as the shipper M is shifted to theright or left. The turningpiece G carries two wings, G G at its lowerend and a dividing-point, G a little above the axis or pivot A Thislatter point as the piece is turned in one direction or the otherreceives the pin E and deflects it to one side or the other.

The upper portion of the turning-piece G extends up forward of thepoint- G as indicated by G This portion is widened above, or fan-shaped,as shown. From its upper edge a rim or lip, G extends backward. Underthis rim are two blocks, H H each original position.

having arsemi-cylindrical groove, h 7L2, across its under face, adaptedto match on the pin E. Each is held in place by bolts extending forwardthrough slots in the part G and by nuts 71.

When, with the parts in the position shown in Fig. 1, the attendantpulls the cord C, he turns the wheel B nearly half around in thedirection of the arrow. This, through the pin B and connection E,depresses the pin E. This as it descends finds the point G in suchposition that it is certain to be deflected to the right and to descendin the branch a of the aperture a. In doing so it acts on the wing G andcompels the turning-piece G to turn, carrying with it the shipper M, andeifectin g the required shift-ing of the position of the belts. (Notrepresented.) The attendant pulls the cord 0 with suificient force toeffect this change, and pulls it sufficiently far to bring the pin Equite down to the bottom of the branch a This efiects the completeshifting of the shipper, and consequently of the belts, which isrequired. Now, on slackening the cord 0 the spring D turns the wheel Bbackward, and the connection E, with its pin E, rises rapidly andengages both in the notch a in the bracket A and in the correspondingnotch, h, in the block H, which is then presented to it. The shipper isfirmly held in this position by the engagement of the pin E both withthe notch a in the fixed bracket A and-with the notch h in the block H,rigidly connected to the turning-piece G, which controls the shipper. Onagain pulling the cord 0 the attendant causes a repetition of themovements, but with the effect to reverse the position of the part G,and consequently of the shipper, and lock it again in the other extremeposition. This shifting is due to the fact that the point G will on thissecond descent of the pin E be presented inclined in the reverseposition to that indicated in Fig. 1, and that it will in this positionincline the pin E to the left, causing itto descend through the arm a ofthe aperture a, and thus to act on the wing G, forcing the lower end ofthe turning part G to the right instead of to the left, as before. Whenthis movement is completed, the turning part G will be again in theposition shown in Fig. 1, and thus have shifted the shipper back to itsNow, again slackening the cord 0, the pin E rises through the branch aand again engages in the notch a this time engaging in the notch ]L2 ofthe block H which is then presented to it. Now, the ship per will beheld firmly for any desired period in this position. lVhen the cord C isagain pulled, the shipper is again shifted, as at first, and so on anynumber of times. If the belting is on the tight pulley, causing thecircular saw or other machine (not represented) to be turned, and theattendant wishes to shift it onto the loose pulley, he simply pulls thecord C a sufficiently strong and long pull to hold the pin E quite downand then releases it, allowing it to go idly back, and the shipper isthereby shifted to the left, carrying the belt upon the loose pulley.(Not shown.) This throws the machine out of use. When under theseconditions the attendant desires to again start the machine, he makes aprecisely similar movement, pulling the cord 0 and again depressing thep1n E as low as it will go, and this by the descent of the pin E in theother branch of the aperture a causes the shipper to be shifted into theopposite direction and again locked. The rising of the pin E brings thenotch h or 7L2 with which it engages into exact coincidence with thenotch a in the bracket. By shifting the position of either block H Hwhich may be done by slacking the nut h and shifting the block along inthe slot in which it is held and retightening the nut the position inwhich the turning-piece G will be held may be varied within considerablelimits. This is important in varying the position in which the belt isheld on the fast and loose pulleys, respectively.

When the blocks H H are shifted inward, as above, it is necessary tostop the descent of the pin E before it reaches the bottom of the brancha or a This is effected by shifting the pin B into one or the other ofthe holes I) in the wheel B, so that the pin will strike against thebracket A and prevent any further turning of the wheel, and consequentlyany further descent of the pin E. When these parts are properlyproportioned, their action insures that one of the notches h It willcoincide with the notch a". This capacity for varying the extent of theshifting movement adapts the same machine to serve for a wide range ofwidths of pulleys and belts.

Modifications may be made without departing from the principle orsacrificing the advantages of the invention. I can make the turning partG an open-work frame instead of the closed plate shown. I can vary thecontour of the aperture a and its branches a a but'it is important thatthe point G be presented in such position as to be certain to receivethe pin E in the right position on its descent and incline it properlyto the right or the left, while at the same time it shall leavesufficient room to allow the pin E to move idly past itwithoutmaterially disturbing it on its ascent.

Parts of the invention may be used without the whole. I can dispensewith the adjustment of the position of the notches of the blocks H H andcast them in one with the turning part G. I prefer the whole as shown.

I claim as my invention- 1. In a belt shifting and locking device, theturning-part G, having the wings G G and the top blocks H H, with theirnotches h 7L2, in combination with the shipper-rod M, bracket A, havingthe aperture a a a and the notch a, and with. the pin E and mechanicalconnections, substantially as specified, for nioving the latter up anddown, all arranged for joint operation, substantially as hereinspecified.

5 2. In a belt shifting and locking device,

and the notch a all substantially as herein specified.

In testimony whereof I have hereunto set my hand, at New York city, this21st day of December,1888, in the presence of two subscrib- I 5 thenotched blocks H H and their adjnst- 1 ing Witnesses. ingmeans h 71?, incombination with the turning-piece G G G G and shipper-rod M, andWitnesses:

with the pin'E' and its operating means, and CHARLES R. SEARLE, 10 thebracket A, having the aperture a a a H. A. J oHNsTONE;

FRANCIS V. MALLETT.

